Beat your time against the clock with Michelin Power Time Trial tire. More rolling efficiency to drop seconds with the Race2 Compound and 3x180 TPI casing, lightweight thanks to the flexible aramid beads that combine robustness and lightness. Designed exclusively for Time Trial events, triathlons, triathlon marathons.Race-2 Compound : New generation of rubber compounds designed to improve rolling resistance. Item Specifications: Defined Color, Black, ISO Diameter, 622 / road / 29", Labeled Size, 700 x 23, Tire Bead, Folding, Tire Type, Clincher, Tire Diameter, 700c, ISO Width (mm), 23 mm, Tire Intended Use, Road, Color, Black,.